summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads.old
diff options
context:
space:
mode:
Diffstat (limited to 'libpthread/linuxthreads.old')
-rw-r--r--libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c80
-rw-r--r--libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h59
2 files changed, 139 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c b/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c
new file mode 100644
index 000000000..1a6aa64a9
--- /dev/null
+++ b/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c
@@ -0,0 +1,80 @@
+/* POSIX spinlock implementation. hppa version.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <pthread.h>
+#include "internals.h"
+
+int
+__pthread_spin_lock (pthread_spinlock_t *lock)
+{
+ unsigned int val;
+
+ do
+ __asm__ __volatile__ ("ldcw %1,%0"
+ : "=r" (val), "=m" (*lock)
+ : "m" (*lock));
+ while (!val);
+
+ return 0;
+}
+weak_alias (__pthread_spin_lock, pthread_spin_lock)
+
+
+int
+__pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+ unsigned int val;
+
+ __asm__ __volatile__ ("ldcw %1,%0"
+ : "=r" (val), "=m" (*lock)
+ : "m" (*lock));
+
+ return val ? 0 : EBUSY;
+}
+weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
+
+
+int
+__pthread_spin_unlock (pthread_spinlock_t *lock)
+{
+ *lock = 1;
+ return 0;
+}
+weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
+
+
+int
+__pthread_spin_init (pthread_spinlock_t *lock, int pshared)
+{
+ /* We can ignore the `pshared' parameter. Since we are busy-waiting
+ all processes which can access the memory location `lock' points
+ to can use the spinlock. */
+ *lock = 1;
+ return 0;
+}
+weak_alias (__pthread_spin_init, pthread_spin_init)
+
+
+int
+__pthread_spin_destroy (pthread_spinlock_t *lock)
+{
+ /* Nothing to do. */
+ return 0;
+}
+weak_alias (__pthread_spin_destroy, pthread_spin_destroy)
diff --git a/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h
new file mode 100644
index 000000000..85c453c77
--- /dev/null
+++ b/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h
@@ -0,0 +1,59 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ hppa version.
+ Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Richard Henderson <rth@tamu.edu>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#include <features.h>
+#include <bits/initspin.h>
+
+#ifndef PT_EI
+# define PT_EI __extern_always_inline
+#endif
+
+/* Get some notion of the current stack. Need not be exactly the top
+ of the stack, just something somewhere in the current frame. */
+#define CURRENT_STACK_FRAME stack_pointer
+register char * stack_pointer __asm__ ("%r30");
+
+
+/* The hppa only has one atomic read and modify memory operation,
+ load and clear, so hppa spinlocks must use zero to signify that
+ someone is holding the lock. */
+
+#define xstr(s) str(s)
+#define str(s) #s
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ int ret;
+
+ __asm__ __volatile__(
+ "ldcw 0(%2),%0"
+ : "=r"(ret), "=m"(*spinlock)
+ : "r"(spinlock));
+
+ return ret == 0;
+}
+#undef str
+#undef xstr
+
+#endif /* pt-machine.h */